The Henry's Law Constant for Helium Gas in Water at 30

Multiple Choice

The Henry's law constant for helium gas in water at 30 °C is 3.70 × 10^-4 M/atm. When the partial pressure of helium above a sample of water is 0.400 atm, the concentration of helium in the water is ________ M.

A) 9.25 × 10^-4
B) 1.08 × 10³
C) 0.800
D) 1.48 × 10^-4
E) 3.70 × 10^-4